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Cable resistance determination in high-power PoE networks

  • US 8,823,402 B2
  • Filed: 11/23/2011
  • Issued: 09/02/2014
  • Est. Priority Date: 11/23/2011
  • Status: Active Grant
First Claim
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1. A power sourcing equipment (PSE) for determining a resistance of a powered cable, said PSE comprising:

  • a first supply voltage to cause a first current to flow through first and second output terminals of said PSE;

    a second supply voltage to cause a second current to flow through third and fourth output terminals of said PSE;

    a current modulation circuit offsetting said second current from said first current to create an offset voltage between said second and said first supply voltages to determine said resistance of said powered cable.

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